August weather forecast
Derby, CO

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Weather in August

August, the last month of the summer in Derby, is also a hot month, with an average temperature ranging between min 60.3°F (15.7°C) and max 87.1°F (30.6°C).

Temperature

August reports an average high-temperature of a still hot 87.1°F (30.6°C), slightly varied from July's 88.3°F (31.3°C). Derby observes a substantial disparity between daytime high and the average low-temperature of 60.3°F (15.7°C) during August nights.

Humidity

August is the least humid month, with an average relative humidity of 39%.

Rainfall

In Derby, in August, it is raining for 5.3 days, with typically 0.24" (6mm) of accumulated precipitation. In Derby, during the entire year, the rain falls for 48.3 days and collects up to 3.19" (81mm) of precipitation.

Snowfall

June through September are months without snowfall.

Daylight

In Derby, the average length of the day in August is 13h and 41min.
On the first day of the month, sunrise is at 5:59 am and sunset at 8:12 pm. On the last day of August, sunrise is at 6:27 am and sunset at 7:32 pm MDT.

Sunshine

In August, the average sunshine is 11.8h.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: In August, an average UV index of 6 transforms into the following instructions:
Steer clear of overexposure. Fair-skinned individuals can be scorched in less than 20 minutes. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Updated: Jul 27, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot is August?

The average high-temperature and low-temperature during August are 87.1°F (30.6°C) and 60.3°F (15.7°C) respectively. In July, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines air temperature and relative humidity, is evaluated at 89.6°F (32°C).

What is the least humid month in Derby?

August is the least humid month, with an average relative humidity of 39%.

What is the average humidity in August?

In Derby, the average relative humidity in August is 39%.

How much does it rain in August?

In August, the rain falls for 5.3 days. Throughout August, 0.24" (6mm) of precipitation is accumulated.

When it does not snow?

In Derby, snow does not fall in June through September.

What is the average length of the day in August in Derby?

In Derby, the average day length in August is 13h and 41min.

What time are sunrise and sunset in August?

In August, on the first day of the month, sunrise is at 5:59 am and sunset at 8:12 pm. On the last day of the month, sunrise is at 6:27 am and sunset at 7:32 pm MDT.

How long on average sun shines in August?

In August, the average sunshine duration is 11.8h.

When is the highest UV index?

The months with the highest UV index are June through August, with an average maximum UV index of 6.

How high is the UV index in August?

In Derby, the average daily maximum UV index in August is 6. A UV Index reading of 6 to 7 represents a high health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Derby, CO

Average temperature in August - Derby, CO
  • Average high temperature in August: 87.1°F

The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is December (41.2°F).

  • Average low temperature in August: 60.3°F

The month with the highest average low temperature is July (61.7°F).
The coldest month (with the lowest average low temperature) is December (21.9°F).

Average pressure in August
Derby, CO

Average pressure in August - Derby, CO
  • Average pressure in August: 30"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are April and June (29.91"Hg).

Average wind speed in August
Derby, CO

Average wind speed in August - Derby, CO
  • Average wind speed in August: 6mph

The windiest month (with the highest average wind speed) is April (6.9mph).
The calmest month (with the lowest average wind speed) is December (5.8mph).

Average humidity in August
Derby, CO

Average humidity in August - Derby, CO
  • Average humidity in August: 39%

The month with the highest relative humidity is February (64%).
The month with the lowest relative humidity is August (39%).

Average rainfall in August
Derby, CO

Average rainfall in August - Derby, CO
  • Average rainfall in August: 0.24"

The wettest month (with the highest rainfall) is July (0.59").
The driest months (with the least rainfall) are January and December (0.08").

Average rainfall days in August
Derby, CO

Average rainfall days in August - Derby, CO
  • Average rainfall days in August: 5.3 days

The month with the highest number of rainy days is July (8.2 days).
The month with the least rainy days is February (1.2 days).

Average snowfall in August
Derby, CO

Average snowfall in August - Derby, CO
  • Average snowfall in August: 0"

The month with the highest snowfall is October (1.42").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in August
Derby, CO

Average snowfall days in August - Derby, CO
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is February (4.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in August /
Average sunshine in August
Derby, CO

Average daylight in August / Average sunshine in August - Derby, CO
  • Average daylight in August: 13h and 4min

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in August: 11h and 5min

The months with the most sunshine are June and July (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 42min).

Average sunshine days in August
Derby, CO

Average sunshine days in August - Derby, CO
  • Average sunshine days in August: 22.3 days

The month with the most sunshine days is December (28.5 days).
The month with the least sunshine days is July (19.6 days).

Average UV index in August
Derby, CO

Average UV index in August - Derby, CO
  • Average UV index in August: 6

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in August
Derby, CO

Average cloud cover in August - Derby, CO
  • Average cloud cover in August: 16

The months with the most cloud cover are February, April and May (Cloud cover 25).
The month with the least cloud cover is September (Cloud cover 14).

Average visibility in August
Derby, CO

Average visibility in August - Derby, CO
  • Average visibility in August: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

Derby, Colorado, USA

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